I shoot a new Rem. ADL 270. It was suggested to me that the standard was 60 gr. of H-4831SC. I would like to use a 130 gr. Sierra BTSP

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Tony C.

Hodgdon shows a 130 gr. Hornday with a 60 gr. charge as a maximum compressed load for a 270

Do you have chronohraph access? In my M700 ADL(.270Win), BTSP bullets normally are most accurate between 2900 and 3000 fps. This translates to about 58.5 to 59grs of H-4831SC.
When I load for flat based bullets 60grs of H-4831SC is my max load, about 3050fps.
Hope this helps
ZM

Loading manuals?

With standard size cases just fill them to the top and seat the bullet. If the case bulges out back off on the powder 'til it quits.

If ya blow primers out back off some more.

Case life is kinda short.

Barrel life is shorter.

Ya'll be real surprised at the velocity you can get.

I actually know a guy who used to load his .264 WinMag that way.

Shot it for years before it blew up.

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To be old and wise.....first you have to be young and stupid!

Tony,

I'm leaving tomorrow morning for a pronghorn hunt. Have worked up a very similar load with the help of Q-Load and a 35P. 24" barrel, 130 gr. BT, WW brass, Fed 210M, 61 gr. H4831sc. MV=3150, PSI is near max at 62,326. But no signs of excessive pressure. Testing was done at about 80 F. I trim cases to 2.540 and seat from ogive for COL of about 3.440 with bullet .020 off lands. I was really looking for about 3100, but this load is a tack driver in the rifle I will be using. This load is very max. but seems safe in *my* rifle. Even 60 gr. is pushing it. If you can get good groups with a little less, I would suggest you do it.

Steve

The "classic" load with a 130 grain bullet was 60 grains of SURPLUS 4831, which burns slightly slower than currently manufactured H4831 (and much slower than IMR 4831).

However, each rifle is a rule unto itself. My Sako gets 3200 FPS with only 58.5 grains of surplus 4831, and shows pressure signs with any more.

So work up for your individual rifle!